Vertical water heater



y 19.51 H. e. FREEMA 2,554,101

VERTICAL WATER HEATER Filed Feb. 18, 1948 2 Sheets-Sheet l II I 49 as Pea 54 I II 5 1s l 15 A II 57' 56 u y 1951 H. G. FREEMAN VERTICAL WATER HEATER Filed Feb. 18, 1948 2 Sheets-Sheet 2 IIIII pill Ell!!! FIG. 5

Patented May 22, 1951 OFFICE VERTICAL WATER HEATER Herbert George Freeman, Montreal, Quebec, Canada Application February 18, 1948, Serial No. 9,185

3 Claims. 1 7

My invention relates to a hot water. furnace.

The objects of the invention, generally, are to improve on known hot water furnaces.

More particularly, a specific object of the invention is to so design a hot water furnace that greatly increased efficiency results therefrom, in that the returning relatively cold water is preheated by the products of combustion as they flow toward the chimney flue.

Another specific object of the. invention is to so design the furnace that it is relatively cheap to manufacture because of the relatively few parts to be assembled, and of the ease with which they are assembled.

A furnace made according to the invention is relatively small in its overall dimensions for a selected or pre-determined thermal effective capacity.

In the drawings, wherein is shown the preferred form of the invention, and wherein like numerals of reference indicate corresponding parts in the various figures,

Figure 1 is a longitudinal section of the furnace, in part broken away;

Figure 2 is a horizontal section on line 2-2 in Figure 1; and

Figures 3 and 4 are details of construction.

Referring now by numerals to the drawings, H) is a masonry base (or it may be ofcast iron) formed with a centrally located recess l l in which is located a suitable oil burner l2. The wall defining the recess is open on one side to provide an opening through which access is gained to the burner. Preferably, a hinged door l3 may be provided to close the opening into the recess.

The furnace proper is formed to provide a central chamber 16 disposed above the burner, into which the products of combustion are received for ultimate delivery to the chimney fiue I4.

The body of the furnace proper comprises two pre-cast or pre-formed sections, an outer section 15 and an inner section I5A, formed and connected or secured together to provide two intercommunicating water compartments, an inner compartment l1 and an outer compartment I'IA, both water compartments communicating together at the bottom as at 18.

Heated water rises in the compartment IT for delivery to radiators or the like (not shown), through two pipes 2|], and the cooled or relatively colder water from the radiator is returned into the outer compartment llA through pipes 19.

The two sections 15 and I5A are substantially symmetrical, and are adapted to nest one into the other, the irmer section I5A nesting into the outer section l5 and being supported therein as with legs 22 depending from the inner section.

For ease in manufacture and assembly of the two sections l5 and I5A, the inner section [5A is formed at one end with a vertical Wall 23, preferably terminating in a slightly outwardly curved lip 24 (see Figure 3). The wall 23, more particularly the lip 24, is welded to the adjacent end of the section 15A as at 25. The other ends of the sections are preferably formed with lips 26 which are welded together as at 2'! (see Figure 4). Thus, the two sections are joined or welded together along two lines or seams.

The vertical wall 23 is cylindrical to provide an opening 28 through which the products of combustion escape from the chamber l6.

Resting upon the top of the section 15A is a box member 29. The box member may be secured to the section 55A as with machine screws 3|] (see Figure 2) passed through lugs 3! integral with the box member and threaded into suitable bosses (not shown) formed on the outer face of the section.

The box member may comprise side walls 32, formed with apertures 34, end walls 33 (see Figure 2 particularly), a top wall 35 formed with an aperture defined by an upright flange 31, a bottom wall 36 formed with an aperture 38, and a diagonal partition 39 extending between the end walls and the side walls and being formed 1 with an aperture 48 (see Figure 1 particularly).

Pivotally mounted to the partition as at 44 is a damper 43 adapted to open or close the aperture Ml. When the damper is lowered to engage the partition and close the aperture 463, the box member is in effect divided into two compartments, one connecting with one of the apertures 34 and the other connecting with the other aperture 34, as best seen in Figure 1.

The damper may be raised by a lever 42 pivoted as at 4| to the flue M and having one end operatively connected to the damper as by a link 45. A counterweight may be provided as shown.

Normally, and for best economy of operation, the damper should be closed; but when lighting the burner, the damper should be held open for a short time.

Extending between the box member 29 and the inner wall of the inner section I 5A is discshaped plate 49 having a central aperture adapted to receive the flue [4, the edge of the plate resting upon spaced lugs 50 secured to or integral with the inner section ISA. The plate may be covered with sand, asbestos or other insulating material 53.

Preferably, the outer wall of the outer section,v

3 I5 is covered with asbestos 54 or other suitable insulating material.

The plate or cover 49 thus defines with the wall of the inner section I5A an annular compartment 55 in communication with the chamber I6 through the box member 29, more particularly through the apertures 34 and the aperture 38.

Dividing the compartment 56 into two com"- partments 60 and 60A (see Figure 2) are two vertical partitions 51, one partition being dis-" posed on each side of the box member 29 adjacent an end wall 33'. The partition is formed to engage the end wall of the box member, thewall of the inner section I5A and the cover plate 49, the partition being supported by the inner section, more particularly by the upper portion 58 of the inner section. The partition may be held in its vertical position as by lugs 63 spaced to receive the partition therebetween.

The partition terminates short of the lower end of the inner section [5A, thus providing a passage 59 which affords the only effectivecom: munication between the compartments 60 and 60A. When the damper is closed, the products of combustion pass out of the box member through one of the openings 34,- descend in the compartment 60, pass into the compartment 68A through the passage 59, rise in the compartment 88A, and enter the box member through the other aperture 34.-

What I claim is 1'. In a hot water furnace, two pre-formed, upright, annular, double-walled sections welded together in nested, substantially parallel relation ship adapted to form inner and outer concentric water compartments communicating together-at the bottom and defining a central gas chamber, and an annular gas chamber between said water compartments communicating with said central chamber at the top; a water discharge duct rising from the top of said inner water'compartment; a return duct opening into the top of said outer water compartment; a fuel burner from which the gases rise into said central gas chamber; a box member above said central chamber having superposed openings whereby the gases may pass to the chimney flue, said box member also having laterally and oppositely-disposed openings communicating with said annular gas chamber; partitions between the adjacent walls of the inner of said sections dividing the upper portion of said annular gas chamber into two sub-chambers communicating together below said partitions, said partitions being disposed in a plane perpendicular to the axis of said oppositely-disposed openings; and a damper operable effectively to divide said box member into two chambers communicating, respectively, with said sub-chambers whereby the gases pass out of said box member into one of said sub-chambers and pass under said partitions back into the other of said sub-chambers for deliver to the chimney flue.

provide two concentrically spaced upright annular water compartments communicating together at the bottom, a central gas chamber enclosed by the inner of said water compartments, and an outer gas chamber between said water compartments; a discharge duct rising from one of said water compartments; a return duct opening into the other of said water compartments; partitions dividing the upper portion of said outer gas chamber into two sub-chambers; a box member above said central chamber receiving the gases rising in said central chamber for delivery to the chimney flue, said box member including two laterany and oppositely disposed openings communicating with said sub-chambers, respectively; and a' damper in said box member operable to direct the rising gases into one of said sub-chambers while admitting gases from the other of said subcha'iiibrs for delivery to the chimney flue.

3. In a hot water furnace, a body comprising a pair of pre-"form'ed, double-walled, substantially" cup-sha-pedannular metal sections adapted to be placed in nested, superimposed, substantially parallel relationship and welded together along their two upper edges to define inner and outer water compartments communicating together at the bottom and defining a central gas chamber, and an outer gas chamber between said water compartments; a water discharge duct rising from the top of said inner water compartments; a return duct opening into the top of said outer water compartments; a box member resting upon the upper one of said sections above said central gas chamber, said box member having registering superimposed openings for delivery of the-gases from said central gas chamber to'the chimney fiues, said box member including two vertical walls having laterally and oppositely disposed openings communicating with said outer gas chamber; vertical partitions between the walls of the" upper one of saidsections and lying in a plane between and parallel to the side openings-in'said box member dividing the upper portion of said outer gas chamber; and a damper in said'box member operable to direct the gases'from said box member into said outer gas chamber onone side of said box member and'to a'dmit'gases back into said box member from the opposite si'de thereof for delivery to the chimney flue.

HERBERT GEORGE FREEMAN.

REFERENCES CITED The following'referen'ces are of record in the file of this patent: 

